It's a hanging network issue that causes the freeze. If you managed to export the wallet backup, you'd still need to get to the seed.

Please disconnect the device from internet so that it starts in offline mode.

1. Backup the seed as the first step.

2. Go to settings > developer > factory reset

3. Get back online

4. Restart the wallet, from last onboarding screen enter wallet recovery from backup. Enter your seed and paste your backup there. If for whatever reason it would fail, select wallet recovery from seed and use it to get back your balance.